K18 conditioner bottle on a blue background

K18 hair care product lineup with mini, full, and jumbo sizes on a blue background

Jumbo DAMAGE SHIELD protective conditioner

Educational poster about hair care, showing a stylized image of hair and text explaining why hair needs protection.

Diagram of hair damage protection with text and molecular structure illustration on a blue background

K18 Damage Shield hair care product with text on a blue background

Person getting hair washed with a focus on hair care product benefits.

Hand holding a K18 hair product bottle with white conditioner being dispensed onto another hand against a blue background

K18 hair care products on a colorful background with text about healthy hair routines.

K18 hair care routine guide with steps for repair and maintenance.

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4.8

Rated 4.8 out of 5 stars

625 Reviews

Jumbo DAMAGE SHIELD protective conditioner

Name: Jumbo DAMAGE SHIELD protective conditioner
Brand: K18Hair
SKU: K18-40056
Price: 84.00 CAD
Availability: InStock
Rating: 4.8 (625 reviews)

Color-safe protective conditioner maintains hair health + strength - now in a jumbo size

Jumbo DAMAGE SHIELD protective conditioner $84.00

Description

A nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

protects from damage for up to 3 days from:

UV rays
mechanical styling
environmental aggressors

how to use

Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
Rinse thoroughly.
For best results, use after shampooing with DAMAGE SHIELD shampoo.

more to know

Clinically proven to provide conditioning protection against damage from UV rays, mechanical styling, and environmental aggressors for up to 3 days*. Fortifies, softens, and detangles hair.

Defends against damage: Conditioning protection against damage from UV rays, environmental aggressors, and daily mechanical styling for up to 3 days.
Maintains hair health: Fortifies hair’s exterior lipid barriers to make hair more resilient and resistant to damage. K18PEPTIDE™ replenishes protein lost during washing.
Enhances hair’s natural shine: pH-optimized formula minimizes excess cuticle swelling during washing to help keep hair smooth and maximize shine.
Softens, smooths, and detangles: Without film-forming silicones or waxes that can build up over time and weigh hair down.

*Disclaimers

key benefits

Biotech-Produced Polysaccharide acts as a biomimetic shield to protect hair against pollution and environmental aggressors.
Fortifying Ceramide Blend seals damage sites in the hair cuticle—smoothing and protecting hair from further damage.
K18PEPTIDE™ replenishes protein lost during washing.

ingredients

Water (Aqua) (Eau), Isopropyl Palmitate, Stearyl Alcohol, Propanediol, Isopentyldiol, Behentrimonium Chloride, Tocopherol, Tocopheryl Acetate, sh-Oligopeptide-78, Alteromonas Ferment Extract, Prunus Amygdalus Dulcis (Sweet Almond) Oil, Simmondsia Chinensis (Jojoba) Seed Oil, Phospholipids, Jojoba Esters, Calcium Gluconate, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Ceramide NP, Phytosteryl/Isostearyl/Cetyl/Stearyl/Behenyl Dimer Dilinoleate, Polyquaternium-16, Stearalkonium Chloride, Isopropyl Alcohol, Butylene Glycol, Gluconolactone, Phenoxyethanol, Sodium Benzoate, Citric Acid, Sodium Hydroxide, Fragrance (Parfum), Hydroxycitronellal.

pairs well with

jumbo leave-in molecular repair hair mask

4.7

Rated 4.7 out of 5 stars

8,986 Reviews

4-minute leave-in treatment to reverse hair damage - now in an exclusive jumbo size

Jumbo DAMAGE SHIELD pH protective shampoo

4.8

Rated 4.8 out of 5 stars

493 Reviews

Color-safe protective shampoo maintains hair health + strength - now in a jumbo size

Description

your protective conditioner questions, answered

Can I use the conditioner instead of the mask?

The mask and conditioner serve two different purposes. The K18 mask reverses damage in 4 minutes, while the K18 conditioner protects hair from daily damage for up to 3 days*. We recommend using the K18 mask first, waiting 4 minutes, then using conditioner for additional softening and detangling benefits between K18 mask days. *Disclaimers

Will the K18 conditioner cause buildup on hair?

No, the K18 conditioner will not cause buildup on hair. The highly concentrated, lightweight gel formula means a little goes a long way. Use less than you typically would with a traditional conditioner, and build as needed.

Will the K18 conditioner weigh hair down?

No, the K18 conditioner will not weigh hair down. This highly concentrated, lightweight gel formula softens, smooths, and detangles without film-forming silicones or waxes that can build up over time.

Does the K18 conditioner need to be reapplied for continued UV protection?

No, you do not need to reapply the K18 conditioner for continued UV protection. This product is clinically proven to protect hair against damage from UV rays for up to 3 days*. *Disclaimers

Does the K18 conditioner have SPF?

No, the K18 conditioner does not have SPF. The biotech-produced polysaccharide and fortifying ceramide blend help minimize the drying and damaging effects of UV rays on the hair's cuticle. This prevents hair from becoming rough, brittle, weak, and prone to breakage from UV damage for up to 3 days*. *Disclaimers

clinically proven protection

days of conditioning protection against damage from UV rays, mechanical styling + environmental aggressors*

agreed hair didn’t feel weighed down*

agreed hair felt softer*

Acts as a biomimetic shield to protect hair BEFORE daily damage occurs—preventing damage, dullness + frizz.

EXPLORE THE SCIENCE

how to use

1. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
2. Thoroughly rinse.

For best results, use after shampooing with DAMAGE SHIELD shampoo.

learn more on our blog

Trichologist Angela Onuoha explains what causes daily hair damage

Trichologist Angela Onuoha breaks down what causes daily hair damage, and how these culprits cause hair breakage, frizz, and dull color. The soluti...

When Should I Use K18 Conditioner vs. Mask?

Damage repair or daily protection? Here’s the guide to finding the perfect K18 healthy hair routine.

FUNdamentals 16: You can still use conditioner

You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18.

FUNdamentals 09: Skipping conditioner makes me nervous

You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18.

FUNdamentals 02: Masks + conditioners vs. K18

You know what's fun? When your product works. We'll be breaking down key info + recommendations weekly to help you get the most out of K18 We’re ...

Myth Busting 04: Conditioners

We get it, skipping conditioner feels wrong. Especially when it’s been a post-shampoo ritual for as long as you can remember. We’re not here to cau...

feel what's possible with K18

See how K18 unlocks our community's expression

4.8

Rated 4.8 out of 5 stars

Based on 625 reviews

96%would recommend these products

Reviews Summary

Customers say this shampoo and conditioner transforms their hair after just a few uses. Many reviews mention noticeable improvements in softness, shine, and manageability. Users with curly hair report better moisture retention and less frizz, while those with fine hair appreciate that it doesn't weigh their hair down. Frequent comments address how a small amount of product creates rich lather and goes a long way. Many note they can extend time between washes while maintaining clean, fresh-looking hair. Reviews highlight the products' effectiveness for detangling and creating smoother, more manageable results.

Customers Talked About

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625 reviews

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Anastassiya K.
Verified Buyer
Reviewing
DAMAGE SHIELD shampoo and conditioner sample
I recommend this product
Rated 5 out of 5 stars
3 weeks ago
Nice!
Tried the K18 DAMAGE SHIELD shampoo + conditioner samples and honestly loved them. My hair felt super soft, smooth, and lightweight after just one wash. The shampoo cleans well without drying, and the conditioner made my hair look shinier and less frizzy. Also, the scent is really nice and fresh. Definitely considering buying the full sizes!
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K
K18Hair
3 weeks ago
Thank you so much for this fantastic review, Anastassiya! We're absolutely thrilled to hear that you loved the DAMAGE SHIELD shampoo and conditioner samples! It's wonderful that you're experiencing how soft, smooth, and lightweight your hair feels after just one wash - that's exactly what we love to hear! We're so excited that the shampoo is cleaning well without drying and that the conditioner is giving you that beautiful shine and frizz control. And we're so glad you love the fresh scent too! It's amazing that you're considering the full sizes - that's the best compliment we could receive! Thanks for your incredible 5-star review! 💛
Michelle S.
Verified Buyer
Reviewing
DAMAGE SHIELD shampoo and conditioner sample
I recommend this product
Rated 5 out of 5 stars
1 month ago
First time buying k18
This is my first purchase of k18 and I wanted to order directly from the website so I knew I was getting the correct product and not some knockoff. After looking at reviews on how to use it properly, I have used it twice so far and what a difference in my hair. I've really damaged hair from highlights. And as I was sitting one day I noticed my hair just looked like a stack of hay. It is so much better now and when I just recently went back for for highlights by hair stylist was like your hair looks so healthy. I told her I was using k18 and she said that's what they use at their salon as well. So I knew I was on to something.
Was this helpful?
K
K18Hair
1 month ago
Thank you so much for your wonderful review, Michelle! 💜 We're absolutely thrilled to hear about the amazing transformation you've experienced with your first k18 purchase! It sounds like it's been a total game-changer for your damaged hair - going from feeling like "a stack of hay" to having your stylist compliment how healthy it looks is incredible!

We love that you chose to order directly from our website to ensure you got the authentic product, and it's so exciting to hear that your salon uses k18 too - you definitely know you're on to something great! Thank you for taking the time to research proper usage and for sharing your fantastic experience with others. Your 5-star review means the world to us!
Sara W.
Verified Buyer
Reviewing
DAMAGE SHIELD shampoo and conditioner sample
I recommend this product
Rated 4 out of 5 stars
2 months ago
Good
I like this product my hair is nice and shiny
Was this helpful?
K
K18Hair
1 month ago
Thank you so much, Sara! We're so happy to hear you're loving the DAMAGE SHIELD shampoo and conditioner and that your hair is nice and shiny! Thanks for your wonderful review! ✨
Mary A. M.
Verified Buyer
Reviewing
DAMAGE SHIELD shampoo and conditioner sample
I recommend this product
Rated 5 out of 5 stars
2 months ago
Amazing Results
I had a recent visit to the salon for color and decided I paid too much just to wash it away with cheap hair products. I received this sample with purchase. For once, my hair had volume and nourishment at the same time, while keeping my color vibrant. I'm sold!
Was this helpful?
K
K18Hair
2 months ago
Thank you so much for this fantastic review, Mary! We're absolutely thrilled to hear that DAMAGE SHIELD is helping you protect that salon investment - you're so right that after spending money on beautiful color, you want products that will maintain and enhance it rather than wash it away! It's wonderful that you're experiencing that perfect combination of volume and nourishment while keeping your color vibrant - that's exactly what we hoped to achieve with this protective formula! We're so happy the sample convinced you and that you're loving the results. Your feedback truly means the world to us!
Marianne A.
Verified Buyer
Reviewing
DAMAGE SHIELD shampoo and conditioner sample
I recommend this product
Rated 5 out of 5 stars
2 months ago
Amazing!
This is great shampoo and conditioner. I have fine colored hair and it gives me amazing shine and volume 100% recommend!
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K
K18Hair
2 months ago
Thank you so much for this amazing review, Marianne! We're absolutely thrilled to hear that DAMAGE SHIELD is delivering such fantastic results for your fine colored hair - giving you that incredible shine and volume is exactly what we hoped to achieve with this protective formula! It's wonderful that you're experiencing such amazing results, especially with color-treated hair which can be so delicate. Your 100% recommendation truly means the world to us, and we're so grateful to have you as part of our K18 community!